Create a seperate file for ActiveSupport::OrderedHash.

activesupport/lib/active_support.rb

@@ -39,6 +39,7 @@
 require 'active_support/dependencies'
 require 'active_support/deprecation'
 
+require 'active_support/ordered_hash'
 require 'active_support/ordered_options'
 require 'active_support/option_merger'
 

activesupport/lib/active_support/ordered_hash.rb

+# OrderedHash is namespaced to prevent conflicts with other implementations
+module ActiveSupport
+  # Hash is ordered in Ruby 1.9!
+  if RUBY_VERSION >= '1.9'
+    OrderedHash = ::Hash
+  else
+    class OrderedHash < Array #:nodoc:
+      def []=(key, value)
+        if pair = assoc(key)
+          pair.pop
+          pair << value
+        else
+          self << [key, value]
+        end
+      end
+
+      def [](key)
+        pair = assoc(key)
+        pair ? pair.last : nil
+      end
+
+      def delete(key)
+        pair = assoc(key)
+        pair ? array_index = index(pair) : nil
+        array_index ? delete_at(array_index).last : nil
+      end
+
+      def keys
+        collect { |key, value| key }
+      end
+
+      def values
+        collect { |key, value| value }
+      end
+
+      def to_hash
+        returning({}) do |hash|
+          each { |array| hash[array[0]] = array[1] }
+        end
+      end
+    end
+  end
+end

activesupport/lib/active_support/ordered_options.rb

-# OrderedHash is namespaced to prevent conflicts with other implementations
-module ActiveSupport
-  # Hash is ordered in Ruby 1.9!
-  if RUBY_VERSION >= '1.9'
-    OrderedHash = ::Hash
-  else
-    class OrderedHash < Array #:nodoc:
-      def []=(key, value)
-        if pair = assoc(key)
-          pair.pop
-          pair << value
-        else
-          self << [key, value]
-        end
-      end
-
-      def [](key)
-        pair = assoc(key)
-        pair ? pair.last : nil
-      end
-      
-      def delete(key)
-        pair = assoc(key)
-        pair ? array_index = index(pair) : nil
-        array_index ? delete_at(array_index).last : nil
-      end
-
-      def keys
-        collect { |key, value| key }
-      end
-
-      def values
-        collect { |key, value| value }
-      end
-
-      def to_hash
-        returning({}) do |hash|
-          each { |array| hash[array[0]] = array[1] }
-        end
-      end
-    end
-  end
-end
-
 class OrderedOptions < ActiveSupport::OrderedHash #:nodoc:
   def []=(key, value)
     super(key.to_sym, value)

activesupport/test/ordered_hash_test.rb

+require 'abstract_unit'
+
+class OrderedHashTest < Test::Unit::TestCase
+  def setup
+    @keys =   %w( blue   green  red    pink   orange )
+    @values = %w( 000099 009900 aa0000 cc0066 cc6633 )
+    @ordered_hash = ActiveSupport::OrderedHash.new
+
+    @keys.each_with_index do |key, index|
+      @ordered_hash[key] = @values[index]
+    end
+  end
+
+  def test_order
+    assert_equal @keys,   @ordered_hash.keys
+    assert_equal @values, @ordered_hash.values
+  end
+
+  def test_access
+    assert @keys.zip(@values).all? { |k, v| @ordered_hash[k] == v }
+  end
+
+  def test_assignment
+    key, value = 'purple', '5422a8'
+
+    @ordered_hash[key] = value
+    assert_equal @keys.length + 1, @ordered_hash.length
+    assert_equal key, @ordered_hash.keys.last
+    assert_equal value, @ordered_hash.values.last
+    assert_equal value, @ordered_hash[key]
+  end
+
+  def test_delete
+    key, value = 'white', 'ffffff'
+    bad_key = 'black'
+
+    @ordered_hash[key] = value
+    assert_equal @keys.length + 1, @ordered_hash.length
+
+    assert_equal value, @ordered_hash.delete(key)
+    assert_equal @keys.length, @ordered_hash.length
+
+    assert_nil @ordered_hash.delete(bad_key)
+  end
+end

activesupport/test/ordered_options_test.rb

 require 'abstract_unit'
 
-class OrderedHashTest < Test::Unit::TestCase
-  def setup
-    @keys =   %w( blue   green  red    pink   orange )
-    @values = %w( 000099 009900 aa0000 cc0066 cc6633 )
-    @ordered_hash = ActiveSupport::OrderedHash.new
-
-    @keys.each_with_index do |key, index|
-      @ordered_hash[key] = @values[index]
-    end
-  end
-
-  def test_order
-    assert_equal @keys,   @ordered_hash.keys
-    assert_equal @values, @ordered_hash.values
-  end
-
-  def test_access
-    assert @keys.zip(@values).all? { |k, v| @ordered_hash[k] == v }
-  end
-
-  def test_assignment
-    key, value = 'purple', '5422a8'
-
-    @ordered_hash[key] = value
-    assert_equal @keys.length + 1, @ordered_hash.length
-    assert_equal key, @ordered_hash.keys.last
-    assert_equal value, @ordered_hash.values.last
-    assert_equal value, @ordered_hash[key]
-  end
-  
-  def test_delete
-    key, value = 'white', 'ffffff'
-    bad_key = 'black'
-    
-    @ordered_hash[key] = value
-    assert_equal @keys.length + 1, @ordered_hash.length
-    
-    assert_equal value, @ordered_hash.delete(key)
-    assert_equal @keys.length, @ordered_hash.length
-    
-    assert_nil @ordered_hash.delete(bad_key)
-  end
-end
-
 class OrderedOptionsTest < Test::Unit::TestCase
   def test_usage
     a = OrderedOptions.new